Scroll handle should have intrinsic width and height

<shape xmlns:android="http://schemas.android.com/apk/res/android"

       android:tint="?attr/colorControlNormal"

       android:shape="rectangle">

    <solid android:color="#84ffffff" />

    <size android:width="4dp" />

    <solid

        android:color="#84ffffff" />

    <size

        android:width="4dp"

        android:height="4dp" />

</shape>